Summary of Significant Accounting Policies Principles of Consolidation (Details)	12 Months Ended
Dec. 31, 2012
Accounting Policies [Abstract]
Number of Wholly-Owned Subsidiaries of the Holding Company	1
Number of Wholly-Owned Subsidiaries of the Bank	2

Represents the number of wholly-owned subsidiaries of the holding company (Bancorp).

No definition available.

Name:	citz_NumberOfWhollyOwnedSubsidiariesOfHoldingCompany
Namespace Prefix:	citz_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration